I bought this pack after having rented it weekly or almost weekly for a year or so. It's one of the best packs I've ever used. Works exactly as it should: safe, reliable, consistent, fast and simple flash pack. Hot plugging/unplugging heads is nice. It's pretty light too. I'd love to have a D4 for the extra control but for the price and the weight this is exceptional gear. I wish everything was as well designed as profoto equipment